Contract Supports Research, Design and Development Work for Sub-,
Super- and Hypersonic Vehicles

DULLES, Va. — (BUSINESS WIRE) — September 21, 2015 —
Orbital ATK, Inc. (NYSE:
OA), a global leader in aerospace and defense
technologies, announced today it has been awarded a Research and
Technologies for Aerospace Propulsion Systems 2 (RTAPS2) contract by
NASA to provide advanced space propulsion system technologies. NASA
developed the RTAPS2 contract as part of aerospace research activities
at the agency’s Glenn Research Center in Cleveland, Ohio.

RTAPS2 makes it possible for qualified industry partners to develop,
demonstrate and verify advanced propulsion system technologies as part
of NASA’s aerospace research programs. Research and development efforts
in these technologies will address a wide variety of propulsion issues
for subsonic, supersonic, hypersonic and rotorcraft transportation
vehicles, as well as addressing issues pertaining to aviation safety and
space exploration missions. The award was made to Alliant Techsystems
Operations LLC, a wholly-owned subsidiary of Orbital ATK.

“This effort reflects our continued commitment to be a key partner in
NASA’s pioneering space endeavors,” said Mike Kahn, President of Orbital
ATK’s Defense Systems Group. “Orbital ATK has a rich history as a
technology partner, and we are continuing to develop advanced solutions
in space access and hypersonics propulsion.”

The Orbital ATK team consists of more than a dozen established
technology partners and small businesses. Under Orbital ATK’s direction
they will research and develop space propulsion technologies that enable
higher mission performance, reduced cost, improved operability and
reliability, and greater safety. Elements of the space propulsion award
include liquid engine systems, propellant systems, electric propulsion
and rocket-based combined cycle.

Orbital ATK is a global leader in aerospace and defense technologies.
The company designs, builds and delivers space, defense and aviation
systems for customers around the world, both as a prime contractor and
merchant supplier. Its main products include launch vehicles and related
propulsion systems; missile products, subsystems and defense
electronics; precision weapons, armament systems and ammunition;
satellites and associated space components and services; and advanced
aerospace structures. Headquartered in Dulles, Virginia, Orbital ATK
employs more than 12,000 people in 18 states across the U.S. and in
several international locations. For more information, visit
www.orbitalatk.com.